Control device using LED backlight partition and control driving method thereof

Abstract

The invention relates to the technical field of electronic equipment, and provides a control device using an LED backlight partition and a control driving method thereof.The control device using the LED backlight partition comprises a display module, a micro control processing unit and an LED chip module, the display module is arranged in a head-up display device and is provided with a display area, the micro control processing unit is arranged in the display area, and the LED chip module is arranged in the display area. The display area comprises a first backlight display area and a second backlight display area, the micro control processing unit is electrically connected with the display module and comprises a driving circuit, and the LED chip module is electrically connected with the driving circuit. The LED chip module is used for receiving a control signal of the driving circuit, driving the LEDs in the second backlight display area to be turned on or turned off, and transmitting a driving signal to the display module to turn on or / and turn off the first backlight display area to display a first display picture and the second backlight display area to display a second display picture at the same time.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and specifically to a control device and control driving method for using LED backlight partitioning. Background Technology

[0002] Most existing head-up display (HUD) devices employ either local dimming or global dimming technologies. These technologies use PWM signals to control the switching time of the backlight module, thereby adjusting the screen brightness. Local dimming technology analyzes the pixel distribution of the screen in real time and adjusts the backlight intensity in different zones, effectively improving screen contrast and detail.

[0003] This type of technology is often used in TVs, mobile phones, or central control displays. Its backlight zone dynamic adjustment method judges the average or peak value of pixels based on the real-time picture and automatically adjusts the brightness of each backlight zone with an algorithm to improve the overall visual effect.

[0004] However, most of the above technologies are designed for "dynamic changes across the entire screen", and cannot predefine the functions and display content of each area, nor do they take into account the requirements of information prompt stability and zone contrast in HUD devices.

[0005] Especially in the application scenarios of HUD or AR-HUD devices, the displayed content is usually a fixed default screen, such as navigation direction, vehicle speed information, driving assistance instructions or warning icons, etc. The core requirements are clear information recognition, stable screen contrast, and real-time system response.

[0006] If the existing regional LED backlight control technology is used, it will require additional computing resources and memory space because it relies on real-time pixel analysis and processing. It may also cause computing delays, brightness flickering or misjudgment of the background, reducing the driver's recognition efficiency and driving safety.

[0007] Furthermore, the relevant regional LED backlight control technology is mainly used in entertainment display devices such as TVs or flat panels. It uses algorithms to analyze real-time pixel changes and then adjusts the brightness of each backlight area. It lacks support for predefined screen content, and its display logic cannot meet the situation of stable information presentation required in head-up display devices. In addition, in order to maintain real-time screen updates and brightness adjustments, the entire system needs to continuously perform complex calculations and sensing, resulting in increased energy consumption and reduced energy efficiency.

[0008] Therefore, how to establish an overall design mechanism for HUD display devices that can control backlight zones, default screen modes, and switch between display stably, while also possessing high stability and energy-saving performance, is a problem that technical personnel urgently need to solve. Summary of the Invention

[0009] One objective of this application is to provide a control device for LED backlight zoning, which is applied in the display device of a vehicle head-up display. It can independently control multiple backlight display areas and precisely drive the on / off and brightness changes of each zone's backlight through a default control mode to stably display specific information images while taking into account the system's low power consumption and high recognition.

[0010] To achieve the aforementioned objectives, this application provides a control device using LED backlight partitioning, which is installed within a vehicle's head-up display (HUD). The control device includes: a display module installed within the HUD, the display module having display areas including a first backlight display area and a second backlight display area; a microcontroller unit electrically connected to the display module, the microcontroller unit including a driver circuit; and an LED chip module electrically connected to the driver circuit. The LED chip module receives control signals from the driver circuit and drives the LEDs in the second backlight display area to start or stop, and simultaneously transmits a driver signal to the display module to start or / and stop the first backlight display area from displaying a first display image, and the second backlight display area from displaying a second display image; wherein the first display image in the first backlight display area is constantly lit.

[0011] This application provides an embodiment in which the second display screen is a non-real-time pixel analysis screen or a value-added service screen.

[0012] This application provides an embodiment in which the control signals include pulse width modulation (PWM) signals and general purpose input / output (GPIO) signals.

[0013] This application provides an embodiment in which the drive signal includes a serial communication protocol signal (SPI / I2C).

[0014] Another objective of this application is to provide a control and driving method using LED backlight zoning for use in vehicle head-up displays (HUDs). This method can selectively turn multiple backlight display areas in the display module on and off according to a default mode to display specific static images, thereby improving the stability and recognizability of the HUD display information.

[0015] To achieve the aforementioned objectives, this application provides a control and driving method using LED backlight zoning, applicable to a head-up display (HUD) in a vehicle. The method includes: setting a display area on the display module of the HUD; wherein the display area includes a first backlight display area and a second backlight display area; a driving circuit of a microcontroller unit transmitting control signals to an LED chip module; and when the LED chip module receives the control signals, the LED chip module drives the LEDs in the second backlight display area to start or stop, and simultaneously transmits driving signals to the display module to start or / and stop the first backlight display area from displaying a first display image, and the second backlight display area from displaying a second display image; wherein the first display image in the first backlight display area is constantly lit.

[0016] This application provides an embodiment in which, in the step of transmitting control signals from the driving circuit of a microcontroller to an LED chip module, the control signal is selected from the storage module of the microcontroller and one of multiple backlight control modes is executed.

[0017] This application provides an embodiment in which the control signals include pulse width modulation (PWM) signals and general purpose input / output (GPIO) signals.

[0018] This application provides an embodiment in which the drive signal includes a serial communication protocol signal (SPI / I2C).

[0019] This application provides an embodiment in which, when an execution signal activates a first backlight display area and a second backlight display area, the first backlight display area displays a first display screen, and the second backlight display area displays a second display screen, the second display screen is a non-real-time pixel analysis screen or a value-added service screen. Attached Figure Description

[0020] Figure 1 This is a schematic block diagram of a control device for LED backlight zoning installed in a head-up display device according to an embodiment of this application.

[0021] Figure 2 This is a schematic flowchart illustrating a control driving method using LED backlight partitioning according to an embodiment of this application.

[0022] Figure 3 This is a schematic diagram illustrating one usage state of an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of another usage state according to an embodiment of this application;

[0024] Figure 5 This is a schematic diagram illustrating yet another usage state of an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of another usage state of an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Head-up display device;

[0028] 10. Display module;

[0029] 12. Display area;

[0030] 121. First backlight display area;

[0031] 123. Second backlight display area;

[0032] 125. Third backlight display area;

[0033] 127. Fourth backlight display area;

[0034] 20. Microcontroller processing unit;

[0035] 22. Drive circuit;

[0036] 30. LED chip module;

[0037] 90. LED;

[0038] S1, control signal;

[0039] S2, drive signal;

[0040] M1, First Display Screen;

[0041] M2, Second Display Screen;

[0042] I1, Input signal. Detailed Implementation

[0043] Current head-up displays (HUDs) mostly employ localized LED backlight control technology, adjusting the brightness of each backlight area by analyzing screen pixels in real time to improve image contrast and visual effects. However, during real-time pixel analysis, algorithm delays or background interference can easily cause unstable brightness in specific areas, thus affecting the driver's ability to recognize important information. Furthermore, to maintain real-time image updates and brightness adjustments, the entire system must continuously perform complex calculations and sensing, leading to increased energy consumption and reduced energy efficiency.

[0044] This invention provides an LED backlight zone control device and its driving method for HUD. It predefines the display content corresponding to each backlight area in the display module and sets multiple modes corresponding to default screens. The system sends control signals through a microcontroller unit (MCU) to effectively control the start or stop of specific backlight zones, displaying fixed default screens. It can quickly complete screen switching and brightness adjustment without real-time pixel analysis, reducing system latency and the risk of misjudgment. More importantly, this technology can activate only the necessary backlight areas according to actual needs and switch them on and off in a low-power mode, significantly improving overall power efficiency and achieving a HUD display solution that combines high stability and energy saving.

[0045] The present application will be described in detail below with reference to the accompanying drawings, illustrating various embodiments thereof. However, the concepts of the present application may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

[0046] First, please refer to Figure 1 , Figure 1 A schematic block diagram of a control device using LED backlight zoning in an embodiment of this application is provided in a head-up display device, and please refer to the accompanying drawings. Figure 2 , Figure 2 This is a flowchart illustrating a control and driving method for LED backlight zoning according to an embodiment of this application; as shown Figure 1 and Figure 2 As shown, the control device using LED backlight partitioning in this embodiment is installed in the head-up display device 1 of a vehicle (not shown), and includes a display module 10, a micro control processing unit 20, and an LED chip module 30. The control driving method using LED backlight partitioning includes the following steps:

[0047] Step S10: Set the display area on the display module of the head-up display device;

[0048] Step S20: The drive circuit of the micro control processing unit transmits control signals to the LED chip module; and

[0049] Step S30: When the LED chip module receives the control signal, the LED chip module drives the LEDs in the second backlight display area to start or turn off, and at the same time transmits the drive signal to the display module to start or / and turn off the first backlight display area to display the first display screen, and the second backlight display area to display the second display screen.

[0050] In this embodiment, as described in step S10, the display module 10 is disposed within the head-up display device 1. The display module 10 includes a backlight module (not shown) and a display panel (not shown). The backlight module and the display panel are disposed overlappingly. The display panel of the display module 10 is provided with a display area 12, which includes a first backlight display area 121 and a second backlight display area 123.

[0051] In this embodiment, the head-up display device 1 is a device that projects information directly into the driver's line of sight, allowing the driver to see important driving information without having to look down at the dashboard or navigator.

[0052] Next, in this embodiment, the micro control processing unit 20 is electrically connected to the display module 10. The micro control processing unit 20 includes a driving circuit 22. Further, in this embodiment, as described in step S20, the driving circuit 22 of the micro control processing unit 20 transmits a control signal S1 to the LED chip module 30. The control signal S1 includes a pulse width modulation signal (PWM) and a general purpose input / output control signal (GPIO). The control signal S1 is selected from the storage module (not shown) of the micro control processing unit 20 and runs one of multiple backlight control modes (not shown).

[0053] In this embodiment, the LED chip module 30 is electrically connected to the driving circuit 22. As described in step S30, when the LED chip module 30 receives the control signal S1, the LED chip module 30 drives the LED 90 of the second backlight display area 123 to start or turn off. At the same time, it transmits the driving signal S2 to the display module 10 to start or / and turn off the first backlight display area 121 to display the first display screen M1, and the second backlight display area 123 to display the second display screen M2.

[0054] In this embodiment, the first display screen M1 of the first backlight display area 121 is always on, that is, the first display screen M1 is a permanently displayed state, while the second display screen M2 of the second backlight display area 123 is a non-real-time pixel analysis screen or a value-added service screen. Furthermore, in this embodiment, the driving signal includes a serial communication protocol signal (SPI / I2C).

[0055] In this embodiment, the so-called "non-real-time pixel analysis screen" refers to the display device pre-defining the corresponding display content of each backlight zone, and turning on or / and off a specific backlight area according to one of the multiple backlight control modes (not labeled) in the storage module, without needing to calculate in real time based on the current pixel changes of the screen. This method can provide a stable and consistent display effect and significantly reduce the calculation burden and system power consumption.

[0056] In contrast, real-time pixel analysis refers to the display device analyzing the current pixel brightness distribution in real time through algorithms during operation, and then dynamically adjusting the brightness of each backlight area. Although this method can enhance the visual effect of dynamic images, when displaying vehicle speed, warnings or fixed information stably in HUD devices, it is prone to problems such as brightness flickering or unstable display due to algorithm delays, misjudgments or background interference.

[0057] In addition, in this embodiment, the second display screen M2 can also be a value-added service screen. Value-added service screens refer to non-core driving information content provided by the in-vehicle system, such as incoming call notifications, weather reports, music playback status, vehicle status alerts, or trip suggestions. Their content is mostly presented in a fixed format or preset template, originating from the in-vehicle system, communication module, or cloud database, and is not generated based on real-time pixel analysis.

[0058] Such value-added service screens are mostly displayed by directly calling stored image or text information from internal programs. Therefore, they should be classified as non-real-time pixel analysis screens, which are suitable for the control design of the second display screen M2 of the second backlight display area 123 in this embodiment, thereby enhancing information stability and visual recognition efficiency.

[0059] The advantage of this embodiment lies in its use of a default control mode combined with a fixed backlight zone design. This allows for the stable display of specific information (such as vehicle speed, navigation, warnings, or value-added services) across specific backlight areas, avoiding algorithm delays or brightness miscontrol issues caused by real-time pixel analysis. Furthermore, by outputting control signals such as PWM, GPIO, and SPI / I2C through a micro-control processing unit, combined with a storage module and driver circuit, the system logic is effectively simplified, backlight control accuracy and display stability are improved, and system power consumption is further reduced, enhancing the reliability and design flexibility of the automotive display. This structure is particularly suitable for head-up display applications requiring stable display of fixed information content over extended periods.

[0060] Next, in order to clearly understand how this embodiment is implemented, a practical example is given below:

[0061] Please refer to Figures 3 to 6 The diagram shows different usage states of an embodiment of this application. Please also refer to Table 1, which shows the energy consumption results of an embodiment of this application. In this embodiment, the display panel of the display module 10 includes a display area 12, and the display content can be switched according to different control modes.

[0062] Table 1

[0063]

[0064] In this embodiment, the display area 12 is divided into multiple backlight display zones, including a first backlight display area 121, a second backlight display area 123, a third backlight display area 125, and a fourth backlight display area 127. Each zone corresponds to different types of screen content such as speed, navigation icons, warning signs, and value-added service information.

[0065] During system operation, the micro control processing unit 20 can adjust the input signal I1 received by the head-up display device 1 (please refer to [link]). Figure 1 The control signal S1 is read from one of its storage modules (not shown). The control signal S1 corresponds to one of a number of predefined backlight control modes, such as one of control modes 1 to control modes 15. The multiple backlight control modes correspond to the activation and / or deactivation of different backlight display areas and can be selected according to actual display requirements.

[0066] After the control signal S1 is output through the drive circuit 22, it drives the backlight module in the display module 10 to selectively turn on or off multiple corresponding backlight display zones to meet the display requirements of specific screens.

[0067] For example, please refer to [further details]. Figure 3 And Table 1, the dashed lines in the figure represent icons that are not displayed. When only the first backlight display area 121 needs to be displayed, the head-up display device 1 can select control mode 1 of multiple backlight control modes to turn off the backlight of the second backlight display area 123, the third backlight display area 125 and the fourth backlight display area 127 to save power consumption.

[0068] When only basic driving information (such as speed and navigation) needs to be displayed in the first backlit display area 121 and the second backlit display area 123, please refer to [the relevant documentation]. Figure 4 As shown in Table 1 (the dashed lines in the figure represent icons that are not displayed), the head-up display device 1 can select control mode 3 of multiple backlight control modes to turn off the backlight of the third backlight display area 125 and the fourth backlight display area 127 in order to save power consumption.

[0069] If it is necessary to display the first backlight display area 121, the second backlight display area 123, and the third backlight display area 125 (please refer to...), Figure 5 As shown in Table 1 (the dashed lines in the figure represent icons that are not displayed), the head-up display device 1 can select control mode 7 of multiple backlight control modes to turn off the backlight of the fourth backlight display area 127 in order to save power consumption.

[0070] Conversely, when a driver activates multiple driver assistance functions or enters complex road conditions, requiring the simultaneous display of multiple information modules (please refer to...). Figure 6(and Table 1), the head-up display device 1 can automatically select control mode 15 of multiple backlight control modes and turn on the backlight display areas of all four areas (first backlight display area 121, second backlight display area 123, third backlight display area 125 and fourth backlight display area 127).

[0071] Please refer to Table 1, which shows the energy consumption results of one embodiment of this application. As shown in the table, the device of this embodiment can still maintain a lower total power consumption than the traditional mode when displaying the full screen (backlight control mode 15), showing excellent energy efficiency (62.5% in this embodiment vs. 100% in the traditional mode). Although it is not as energy-efficient as the partial backlight adjustment method (62.5% vs. 47.7%), the design is simpler and does not require real-time calculation.

[0072] Therefore, this embodiment enables the head-up display device 1 to automatically select the optimal backlight control mode according to the driving situation, achieving the technical effects of energy saving, power saving, strong image correspondence and clear and stable display.

[0073] The embodiments described above, in this application, provide a control device and driving method for using LED backlight partitioning. Multiple backlight display areas are set in the display area, and a driving circuit enables a specific backlight display area to display a specific display image. This avoids algorithm delays or brightness miscontrol issues caused by real-time pixel analysis. Furthermore, by outputting control signals such as PWM, GPIO, and SPI / I2C through a micro control processing unit, combined with a storage module and driving circuit, the system logic can be effectively simplified, the backlight control accuracy and display stability can be improved, and the system power consumption can be further reduced, while improving the reliability and design flexibility of the vehicle display.

[0074] However, the above description is merely a preferred embodiment of this application and is not intended to limit the scope of this application. All equivalent variations and modifications made in accordance with the shape, structure, features and spirit described in the claims of this application should be included within the scope of the claims of this application.

Claims

1. A control device using LED backlight zoning, installed within a vehicle's head-up display, characterized in that, The control device using LED backlight zoning includes: A display module is disposed within the head-up display device. The display module has a display area, which includes a first backlight display area and a second backlight display area. A micro control processing unit, electrically connected to the display module, the micro control processing unit including a driving circuit; and The LED chip module is electrically connected to the driving circuit. The LED chip module is used to receive the control signal from the driving circuit and drive the LEDs in the second backlight display area to start or turn off. At the same time, it transmits the driving signal to the display module to start or / and turn off the first backlight display area to display the first display screen, and the second backlight display area to display the second display screen. The first display screen in the first backlight display area is always on.

2. The control device using LED backlight zoning as described in claim 1, characterized in that, The second display screen is a non-real-time pixel analysis screen or a value-added service screen.

3. The control device using LED backlight zoning as described in claim 1, characterized in that, The control signals include pulse width modulation signals and general input / output control signals.

4. The control device using LED backlight zoning as described in claim 1, characterized in that, The drive signal includes a serial communication protocol signal.

5. A control and driving method using LED backlight zoning, for use in a head-up display device in a vehicle, characterized in that, The control and driving method using LED backlight zoning includes: A display area is set on the display module of the head-up display device; wherein, the display area includes a first backlight display area and a second backlight display area; The drive circuit of the micro control processing unit transmits control signals to the LED chip module; and When the LED chip module receives the control signal, the LED chip module drives the LEDs in the second backlight display area to start or turn off, and at the same time transmits a drive signal to the display module to start or / and turn off the first backlight display area to display the first display screen, and the second backlight display area to display the second display screen; The first display screen in the first backlight display area is always on.

6. The control and driving method using LED backlight partitioning as described in claim 5, characterized in that, In the step of transmitting control signals from the drive circuit of the microcontroller to the LED chip module, the control signal is selected from the storage module of the microcontroller and one of multiple backlight control modes is executed.

7. The control and driving method using LED backlight partitioning as described in claim 5, characterized in that, The control signals include pulse width modulation signals and general input / output control signals.

8. The control and driving method using LED backlight partitioning as described in claim 5, characterized in that, The drive signal includes a serial communication protocol signal.

9. The control and driving method using LED backlight partitioning as described in claim 5, characterized in that, In the steps of the first backlight display area displaying the first display screen and the second backlight display area displaying the second display screen when the execution signal activates the first backlight display area and the second backlight display area, the second display screen is a non-real-time pixel analysis screen or a value-added service screen.

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